OPEN TO THE PUBLIC - No reservations required! The Cheyenne Mountain Shooting Complex (CMSC) is a partnership between the U.S. Army, El Paso County, the El Paso County Sheriff and Colorado Parks and Wildlife and the U.S. Forest Service. This 400-acre site features 9 Independent ranges with over 110 individual covered firing points, over 50 pistol positions, and distances from 7 yards for handguns to 300 yards on paper for rifles.